static IntPtr _OpenSCManager(_ScmAccessRights rights)
            {
                IntPtr scm = OpenSCManager(null, null, rights);

                if (scm == IntPtr.Zero)
                {
                    throw new ApplicationException("Could not connect to service control manager.");
                }

                return(scm);
            }
 static extern IntPtr OpenSCManager(string machineName, string databaseName, _ScmAccessRights dwDesiredAccess);